been doing some research to compile Timeline Aftershock graphs for significant global events and used one off the USGS web site called SISRA to get
data for Chile 1960.
Wondering what SISRA stands for I found this page, explains the databases USGS uses. earthquake.usgs.gov...
this was interesting

PDE Preliminary Determinations of Epicenters, Monthly Listing. This list is the most complete computation of hypocenters and magnitudes done by
the USGS NEIC. It is normally produced a few months after the events occur. The publication is called "Preliminary" because the "final" computation
of hypocenters for the world is considered to be the Bulletin of the International Seismological Centre (ISC), which is produced about two years after
the earthquakes occur.
The NEIC PDE program contributes about one-third off all data used by the ISC.

I think that parts of LA and San Francisco should get extremely reinforced, depending upon suspicion of where the fault will produce the most damage.
Clearly we're looking at a window of about several more years or next week, but either way it's unavoidable from what the world seems to believe.
California has a higher population than all of Canada the last I checked. I haven't really heard of any developments, but they should have a
Japan-like or Japan-based system going very soon, at the least.

I think a lot of people feel that CA will have it's own Japan quake, though probably not as a big, hopefully not as big. I can't imagine the same
situation thrown at Japan put in reverse and given to the western NA, but that's what people should be aware, with the most preparedness possible to
alleviate the anxiety.

do I have to go back and restart (recheck) the Global 7+ Project for the 2nd time?, Centennial List not the end all of catalogues by the look
of it now

Basically no. The Centennial is an accepted catalogue. You also have to be careful about chasing magnitudes. There are many different determinations
of magnitudes as you are well aware and the PDE (used in the circular search) is not any different in that respect.

That was using Mw, and using Any for the magnitude I could find not one of the ones you said, nor could I find the Chile Earthquake or basically any
over about 6. You will have to let us in on the secret for the parameters.

The ISC's Internet link is limited to 56 kbit/s, so it is not possible to provide extremely large quantities of data from the web site. To avoid
overloading either our Internet link or our database server, we currently respond only to queries that return fewer than 6,400 events without phase
data

based on the time, the "bigun" is listed on ISC as
Event 879135
Magnitude Err Nsta Author OrigID
8.3 PAS 1906800

I put the 4 versions of co-ordinates into Google Earth along with my KMZ file and the locations are all over the place, ehb has it on land, whereas
Coast and Geodetic Survey of the United States (CGS) has it pretty close to where I had it located by NOAA

Re the 2 Iranian ones and the North Korea,
QUE (Pakistan Geological Survey) can't be ignored as they are a neighbouring country
MAT (the 7 listing for the Korean one) is
Matsushiro, Japan, which is plausable, well enough for ISC to use it along with 6.5 and 6.5 PAS and BRK

for the purposes of the "7+ Project" anything that is listed as a 7 gets in, regardless of magnitude type.
On the map popups the other networks readings are included even if they are below 7.

the whole thing is quite complex

I already have ISC listed as a source on my 7+ Project, I think from memory Utsu grabbed those to include in his project, but it seems using the ISC
site itself brings up more borderline events and as can be seen from this current 1960 search result, if it looks, smells and feels like a 7 then they
put it in, even if only one station got it at Mag 7.
My project is more about presenting the information in a more user friendly format (maps and graphs) than a bunch of lists, but I do want to be
accurate with the data.

Thanks for that muzzy. From your chart there, it appears to me the 9.1 and 8.6 may have been two separate events in Sumatra, each complete with its
own set of aftershocks which decrease in magnitude and frequency over time. Did the 9.1 trigger the 8.6? That is the question.

Chance for big tsunami in eastern Japan within 30 yrs revised up to 30%

TOKYO (Kyodo) -- The probability of a major earthquake occurring and triggering a massive tsunami in the Pacific Ocean off eastern and
northeastern Japan within the next 30 years has been revised up to 30 percent from 20 percent, a government panel said Friday.

The Earthquake Research Committee has reexamined its long-term estimate of killer temblors after the March 11 quake and tsunami and found that a quake
that triggers a tsunami as powerful as the one caused by the 1896 Meiji-Sanriku Earthquake, which killed more than 20,000 people, is more likely to
happen in the sea zone stretching 800 kilometers north-south.

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